/* Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
+-- Copyright (C) 1994-2015 Lua.org, PUC-Rio.
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
#include "lua.h"
#include "lauxlib.h"
+#if (LUA_VERSION_NUM == 502)
+#define luaL_register(L, N, R) luaL_setfuncs(L, R, 0)
+#endif
+
/***************** BASE64 *****************/
static const char code[]=
{ NULL, NULL }
};
-/***************** STRINGPREP *****************/
-#ifndef USE_STRINGPREP_ICU
-/****************** libidn ********************/
+/******************* UTF-8 ********************/
-#include <stringprep.h>
+/*
+ * Adapted from Lua 5.3
+ * Needed because libidn does not validate that input is valid UTF-8
+ */
-static int stringprep_prep(lua_State *L, const Stringprep_profile *profile)
-{
- size_t len;
- const char *s;
- char string[1024];
- int ret;
- if(!lua_isstring(L, 1)) {
- lua_pushnil(L);
- return 1;
+#define MAXUNICODE 0x10FFFF
+
+/*
+ * Decode one UTF-8 sequence, returning NULL if byte sequence is invalid.
+ */
+static const char *utf8_decode (const char *o, int *val) {
+ static unsigned int limits[] = {0xFF, 0x7F, 0x7FF, 0xFFFF};
+ const unsigned char *s = (const unsigned char *)o;
+ unsigned int c = s[0];
+ unsigned int res = 0; /* final result */
+ if (c < 0x80) /* ascii? */
+ res = c;
+ else {
+ int count = 0; /* to count number of continuation bytes */
+ while (c & 0x40) { /* still have continuation bytes? */
+ int cc = s[++count]; /* read next byte */
+ if ((cc & 0xC0) != 0x80) /* not a continuation byte? */
+ return NULL; /* invalid byte sequence */
+ res = (res << 6) | (cc & 0x3F); /* add lower 6 bits from cont. byte */
+ c <<= 1; /* to test next bit */
+ }
+ res |= ((c & 0x7F) << (count * 5)); /* add first byte */
+ if (count > 3 || res > MAXUNICODE || res <= limits[count] || (0xd800 <= res && res <= 0xdfff) )
+ return NULL; /* invalid byte sequence */
+ s += count; /* skip continuation bytes read */
}
- s = lua_tolstring(L, 1, &len);
- if (len >= 1024) {
- lua_pushnil(L);
- return 1; /* TODO return error message */
+ if (val) *val = res;
+ return (const char *)s + 1; /* +1 to include first byte */
+}
+
+/*
+ * Check that a string is valid UTF-8
+ * Returns NULL if not
+ */
+const char* check_utf8 (lua_State *L, int idx, size_t *l) {
+ size_t pos, len;
+ const char *s = luaL_checklstring(L, 1, &len);
+ pos = 0;
+ while (pos <= len) {
+ const char *s1 = utf8_decode(s + pos, NULL);
+ if (s1 == NULL) { /* conversion error? */
+ return NULL;
+ }
+ pos = s1 - s;
}
- strcpy(string, s);
- ret = stringprep(string, 1024, (Stringprep_profile_flags)0, profile);
- if (ret == STRINGPREP_OK) {
- lua_pushstring(L, string);
- return 1;
- } else {
- lua_pushnil(L);
- return 1; /* TODO return error message */
+ if(l != NULL) {
+ *l = len;
}
+ return s;
}
-#define MAKE_PREP_FUNC(myFunc, prep) \
-static int myFunc(lua_State *L) { return stringprep_prep(L, prep); }
+static int Lutf8_valid(lua_State *L) {
+ lua_pushboolean(L, check_utf8(L, 1, NULL) != NULL);
+ return 1;
+}
-MAKE_PREP_FUNC(Lstringprep_nameprep, stringprep_nameprep) /** stringprep.nameprep(s) */
-MAKE_PREP_FUNC(Lstringprep_nodeprep, stringprep_xmpp_nodeprep) /** stringprep.nodeprep(s) */
-MAKE_PREP_FUNC(Lstringprep_resourceprep, stringprep_xmpp_resourceprep) /** stringprep.resourceprep(s) */
-MAKE_PREP_FUNC(Lstringprep_saslprep, stringprep_saslprep) /** stringprep.saslprep(s) */
+static int Lutf8_length(lua_State *L) {
+ size_t len;
+ if(!check_utf8(L, 1, &len)) {
+ lua_pushnil(L);
+ lua_pushliteral(L, "invalid utf8");
+ return 2;
+ }
+ lua_pushinteger(L, len);
+ return 1;
+}
-static const luaL_Reg Reg_stringprep[] =
+static const luaL_Reg Reg_utf8[] =
{
- { "nameprep", Lstringprep_nameprep },
- { "nodeprep", Lstringprep_nodeprep },
- { "resourceprep", Lstringprep_resourceprep },
- { "saslprep", Lstringprep_saslprep },
+ { "valid", Lutf8_valid },
+ { "length", Lutf8_length },
{ NULL, NULL }
};
-#else
+
+/***************** STRINGPREP *****************/
+#ifdef USE_STRINGPREP_ICU
+
#include <unicode/usprep.h>
#include <unicode/ustring.h>
#include <unicode/utrace.h>
return 1;
}
u_strFromUTF8(unprepped, 1024, &unprepped_len, input, input_len, &err);
+ if (U_FAILURE(err)) {
+ lua_pushnil(L);
+ return 1;
+ }
prepped_len = usprep_prepare(profile, unprepped, unprepped_len, prepped, 1024, 0, NULL, &err);
if (U_FAILURE(err)) {
lua_pushnil(L);
return 1;
} else {
u_strToUTF8(output, 1024, &output_len, prepped, prepped_len, &err);
- if(output_len < 1024)
+ if (U_SUCCESS(err) && output_len < 1024)
lua_pushlstring(L, output, output_len);
else
lua_pushnil(L);
{ "saslprep", Lstringprep_saslprep },
{ NULL, NULL }
};
-#endif
+#else /* USE_STRINGPREP_ICU */
-/***************** IDNA *****************/
-#ifndef USE_STRINGPREP_ICU
/****************** libidn ********************/
-#include <idna.h>
-#include <idn-free.h>
+#include <stringprep.h>
-static int Lidna_to_ascii(lua_State *L) /** idna.to_ascii(s) */
+static int stringprep_prep(lua_State *L, const Stringprep_profile *profile)
{
size_t len;
- const char *s = luaL_checklstring(L, 1, &len);
- char* output = NULL;
- int ret = idna_to_ascii_8z(s, &output, IDNA_USE_STD3_ASCII_RULES);
- if (ret == IDNA_SUCCESS) {
- lua_pushstring(L, output);
- idn_free(output);
+ const char *s;
+ char string[1024];
+ int ret;
+ if(!lua_isstring(L, 1)) {
+ lua_pushnil(L);
return 1;
- } else {
+ }
+ s = check_utf8(L, 1, &len);
+ if (s == NULL || len >= 1024 || len != strlen(s)) {
lua_pushnil(L);
- idn_free(output);
return 1; /* TODO return error message */
}
-}
-
-static int Lidna_to_unicode(lua_State *L) /** idna.to_unicode(s) */
-{
- size_t len;
- const char *s = luaL_checklstring(L, 1, &len);
- char* output = NULL;
- int ret = idna_to_unicode_8z8z(s, &output, 0);
- if (ret == IDNA_SUCCESS) {
- lua_pushstring(L, output);
- idn_free(output);
+ strcpy(string, s);
+ ret = stringprep(string, 1024, (Stringprep_profile_flags)0, profile);
+ if (ret == STRINGPREP_OK) {
+ lua_pushstring(L, string);
return 1;
} else {
lua_pushnil(L);
- idn_free(output);
return 1; /* TODO return error message */
}
}
-#else
+
+#define MAKE_PREP_FUNC(myFunc, prep) \
+static int myFunc(lua_State *L) { return stringprep_prep(L, prep); }
+
+MAKE_PREP_FUNC(Lstringprep_nameprep, stringprep_nameprep) /** stringprep.nameprep(s) */
+MAKE_PREP_FUNC(Lstringprep_nodeprep, stringprep_xmpp_nodeprep) /** stringprep.nodeprep(s) */
+MAKE_PREP_FUNC(Lstringprep_resourceprep, stringprep_xmpp_resourceprep) /** stringprep.resourceprep(s) */
+MAKE_PREP_FUNC(Lstringprep_saslprep, stringprep_saslprep) /** stringprep.saslprep(s) */
+
+static const luaL_Reg Reg_stringprep[] =
+{
+ { "nameprep", Lstringprep_nameprep },
+ { "nodeprep", Lstringprep_nodeprep },
+ { "resourceprep", Lstringprep_resourceprep },
+ { "saslprep", Lstringprep_saslprep },
+ { NULL, NULL }
+};
+#endif
+
+/***************** IDNA *****************/
+#ifdef USE_STRINGPREP_ICU
#include <unicode/ustdio.h>
#include <unicode/uidna.h>
/* IDNA2003 or IDNA2008 ? ? ? */
char output[1024];
u_strFromUTF8(ustr, 1024, &ulen, s, len, &err);
+ if (U_FAILURE(err)) {
+ lua_pushnil(L);
+ return 1;
+ }
+
dest_len = uidna_IDNToASCII(ustr, ulen, dest, 1024, UIDNA_USE_STD3_RULES, NULL, &err);
if (U_FAILURE(err)) {
lua_pushnil(L);
return 1;
} else {
u_strToUTF8(output, 1024, &output_len, dest, dest_len, &err);
- if(output_len < 1024)
+ if (U_SUCCESS(err) && output_len < 1024)
lua_pushlstring(L, output, output_len);
else
lua_pushnil(L);
size_t len;
int32_t ulen, dest_len, output_len;
const char *s = luaL_checklstring(L, 1, &len);
- UChar* ustr;
+ UChar ustr[1024];
UErrorCode err = U_ZERO_ERROR;
UChar dest[1024];
char output[1024];
u_strFromUTF8(ustr, 1024, &ulen, s, len, &err);
+ if (U_FAILURE(err)) {
+ lua_pushnil(L);
+ return 1;
+ }
+
dest_len = uidna_IDNToUnicode(ustr, ulen, dest, 1024, UIDNA_USE_STD3_RULES, NULL, &err);
if (U_FAILURE(err)) {
lua_pushnil(L);
return 1;
} else {
u_strToUTF8(output, 1024, &output_len, dest, dest_len, &err);
- if(output_len < 1024)
+ if (U_SUCCESS(err) && output_len < 1024)
lua_pushlstring(L, output, output_len);
else
lua_pushnil(L);
return 1;
}
}
+
+#else /* USE_STRINGPREP_ICU */
+/****************** libidn ********************/
+
+#include <idna.h>
+#include <idn-free.h>
+
+static int Lidna_to_ascii(lua_State *L) /** idna.to_ascii(s) */
+{
+ size_t len;
+ const char *s = check_utf8(L, 1, &len);
+ if (s == NULL || len != strlen(s)) {
+ lua_pushnil(L);
+ return 1; /* TODO return error message */
+ }
+ char* output = NULL;
+ int ret = idna_to_ascii_8z(s, &output, IDNA_USE_STD3_ASCII_RULES);
+ if (ret == IDNA_SUCCESS) {
+ lua_pushstring(L, output);
+ idn_free(output);
+ return 1;
+ } else {
+ lua_pushnil(L);
+ idn_free(output);
+ return 1; /* TODO return error message */
+ }
+}
+
+static int Lidna_to_unicode(lua_State *L) /** idna.to_unicode(s) */
+{
+ size_t len;
+ const char *s = luaL_checklstring(L, 1, &len);
+ char* output = NULL;
+ int ret = idna_to_unicode_8z8z(s, &output, 0);
+ if (ret == IDNA_SUCCESS) {
+ lua_pushstring(L, output);
+ idn_free(output);
+ return 1;
+ } else {
+ lua_pushnil(L);
+ idn_free(output);
+ return 1; /* TODO return error message */
+ }
+}
#endif
static const luaL_Reg Reg_idna[] =
/***************** end *****************/
-static const luaL_Reg Reg[] =
-{
- { NULL, NULL }
-};
-
LUALIB_API int luaopen_util_encodings(lua_State *L)
{
#ifdef USE_STRINGPREP_ICU
init_icu();
#endif
- luaL_register(L, "encodings", Reg);
+ lua_newtable(L);
- lua_pushliteral(L, "base64");
lua_newtable(L);
luaL_register(L, NULL, Reg_base64);
- lua_settable(L,-3);
+ lua_setfield(L, -2, "base64");
- lua_pushliteral(L, "stringprep");
lua_newtable(L);
luaL_register(L, NULL, Reg_stringprep);
- lua_settable(L,-3);
+ lua_setfield(L, -2, "stringprep");
- lua_pushliteral(L, "idna");
lua_newtable(L);
luaL_register(L, NULL, Reg_idna);
- lua_settable(L,-3);
+ lua_setfield(L, -2, "idna");
+
+ lua_newtable(L);
+ luaL_register(L, NULL, Reg_utf8);
+ lua_setfield(L, -2, "utf8");
- lua_pushliteral(L, "version"); /** version */
lua_pushliteral(L, "-3.14");
- lua_settable(L,-3);
+ lua_setfield(L, -2, "version");
return 1;
}
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